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A098854 Number of triangle-free self-polar configurations of type (n_3). 3
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 2, 6, 40, 303 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,18
LINKS
A. Betten, G. Brinkmann and T. Pisanski, Counting symmetric configurations v_3, Discrete Appl. Math., 99 (2000), 331-338.
CROSSREFS
Sequence in context: A337071 A354313 A351739 * A056787 A098852 A274482
KEYWORD
nonn,hard,more
AUTHOR
N. J. A. Sloane, Nov 05 2004
STATUS
approved

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Last modified March 28 16:58 EDT 2024. Contains 371254 sequences. (Running on oeis4.)